For DRBD resources with long names that start with the same prefix,it was difficult to find all process pids for that minor since namesare truncated to the task_struct's comm field (16 bytes).

This patch names all processes associated with a DRBD device as drbdN_*where N is the DRBD minor in the same ways that the drbdN_submit workqueueis named. Userspace tools can then lookup the name=>minor=>pid mappingand for all pids and use tools like chrt, ioprio, nice, add pids tocgroups, or for other useful purpose.